Your friend is in trouble alright, but intervening is tricky stuff. You say she is your friend, but it's really going to come down to how close a friend as to weather you can reach her. If you're close enough, you might be able to so spill your guts to her that she would be compelled even from the depths of her state. But short of that, not much works. Maybe you could get enough info from a pill bottle to let her dr know she's in rough shape. That's kind of a snoopy thing to do, but hey, sometimes you do things trying to help someone you wouldn't do otherwise. I'm sorry you're facing a tough situation. I hope she gets some help soon.